feature/Initial feature export, enabling node_view and user_view and default panel layouts

## Ready State: (Yes)

## Requirements & Dependencies

* This PR requires https://github.com/imagex/imagex_installkit/pull/58 so it can be included and installed out of the box.

## Usage/Test Instructions

* Includes variables to enable node_view and user_view, which is needed by every feature & content type that implements Panelizer's 'full page override' - we try to follow this approach for panelizer as this makes more contextual variables available to the panel.
* Includes settings defining which layouts are available by default. Features implementing Panelizer settings can just inherit these.